A compound improver for vanadium-contaminated soil and its preparation method and improvement method

A technology of improving agent and vanadium pollution, which is applied in the field of compound improving agent and preparation of vanadium-contaminated soil, to achieve the effect of being convenient for commercial promotion and application, beneficial for improvement and restoration, and improving soil structure

Active Publication Date: 2017-10-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the above-mentioned problems in the prior art, the object of the present invention is to provide a compound improver for vanadium-contaminated soil and its preparation method and improvement method, which are mainly used to solve the improvement of fertile and poor soil polluted by heavy metal vanadium. Restoration, has the functions of improving the fertility, water storage capacity, ion exchange rate and buffering soil pH value of soil polluted by heavy metals such as vanadium, making it suitable for the growth of various plants such as centipede grass, reed, and yellow shell grass

Method used

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  • A compound improver for vanadium-contaminated soil and its preparation method and improvement method
  • A compound improver for vanadium-contaminated soil and its preparation method and improvement method
  • A compound improver for vanadium-contaminated soil and its preparation method and improvement method

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Embodiment 1

[0032] Present embodiment is a kind of composite improver for vanadium-contaminated soil, and it is made by each component according to following weight ratio: A component: macromolecular organic matter polyacrylamide (PAM) 0.003g, flue gas desulfurization gypsum 0.11g; B component: compost sludge 22.73g, sodium-based modified bentonite 7.27g.

[0033] The preparation method of the B-group compound improver for vanadium-contaminated soil is prepared by the following steps:

[0034] Step 1: Stir compost sludge and sodium-based modified bentonite in a beaker for 10 minutes, then move to a crusher for uniform crushing.

[0035] Step 2: Extrude and granulate in an extrusion granulator. The obtained is the soil conditioner of group B used in the laboratory, and it is ready for use (the laboratory does not sieve the shape).

[0036] The improvement method of applying the soil compound improver to vanadium-contaminated soil: take 250g of mixed soil in a plastic cup, apply 2.2g of g...

Embodiment 2

[0038]Present embodiment is a kind of composite improver for vanadium-contaminated soil, and it is made by each component according to following weight ratio: A component: macromolecular organic matter polyacrylamide (PAM) 0.004g, flue gas desulfurization gypsum 0.21g; B component: 2.5g of the B group improver prepared in Example 1.

[0039] The improvement method of applying the soil compound improver to vanadium-contaminated soil: take 250g of the compound soil in a plastic cup, apply the compound improver of group B to the soil, till and mix, and then sprinkle the improver of group A on The soil surface was sprinkled with water, and the water content measured after 2 days was 5.32%, which was treatment 3. In treatment 3, 50 grains of spring wheat were sown, covered with soil with a thickness of 1.2 cm, poured 50 ml of deionized water, placed in an artificial climate box, poured 100 ml of pure water every other day, and cultivated for 15 days. Determination of soil moisture...

Embodiment 3

[0041] This example is a kind of composite improver for vanadium-contaminated soil: Group A: 0.005 g of polymer organic polyacrylamide (PAM), 0.31 g of flue gas desulfurization gypsum; Group B: the improvement of Group B obtained in Example 1 Dose 3.0g.

[0042] The same implementation method as in Example 2, the experimental treatment is set as treatment 4.

[0043] Such as figure 1 Shown is the soil water content curve chart of experimental treatment 1, 2, 3, 4 measured in the embodiment, as can be seen from the figure: after adding compound improver, the water content of the soil of experimental treatment 2, 3, 4 The rate was increased by 1.07 times, 0.60 times and 0.49 times respectively compared with the control treatment 1. Experimental treatment 2 can significantly improve the water retention effect of the soil.

[0044] Such as figure 2 Shown, is the soil pH figure that records experimental treatment 1,2,3,4 in the embodiment, as can be seen from the figure: after...

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Abstract

The invention discloses a compound conditioner for vanadium contaminated soil as well as a preparation method and a conditioning method of the conditioner. The conditioner consists of the following components in parts by weight: A component: 1.5-2.5 parts of a high molecular organic matter, namely polyacrylamide PAM, and 100-150 parts of flue gas desulfurization gypsum; and B component: 50-100 parts of compost sludge and 5-20 parts of sodium-based modified bentonite; the conditioning method comprises the following steps: mixing host soil and extra soil; applying B component compound modifier to the mixed soil by an applying amount of 2-3kg / m<2.; scattering A component compound modifier to the surface of the mixed soil by an applying amount of 0.08-0.12kg / m<2>, and watering; and after two days, carrying out a step of planting ciliate desert-grass, reed, themeda japonica and other plants in the conditioned soil when moisture content is tested to be 5-15%. The conditioner disclosed by the invention has functions of improving the fertility, the water-holding capacity and the ion exchange rate of soil contaminated by such heavy metals as vanadium, buffering the pH value of the soil and the like.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and in particular relates to a compound improver for vanadium-contaminated soil, a preparation method and an improvement method. Background technique [0002] The soil of cultivated land in our country is seriously polluted by heavy metals. Heavy metals accumulate in crops and endanger human health through the food chain. At present, there are many studies on the improvement technology of soil contaminated by cadmium, lead and arsenic, but there are few improvement technologies for soil contaminated by vanadium. [0003] In order to improve the soil polluted by heavy metals into soil suitable for plant growth, many methods have been disclosed in the prior art. For example, the Chinese patent document with application number 201310477113.6 discloses a method of drying, pre-carbonizing and carbonizing bamboo shoot shells using biomass. The obtained solid bamboo shell-based biochar modifie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/00B09C1/08C05G3/04C09K101/00C09K109/00C05G3/80
CPCB09C1/00B09C1/08C05G3/80C09K17/40C09K2101/00C09K2109/00
Inventor 蒋建国张文杰刘诺丁旭彤
Owner TSINGHUA UNIV
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